TLV431ALPRP

Overview

The TLV431ALPRP is a low voltage precision adjustable shunt regulator manufactured by onsemi. It features an internal reference voltage of 1.24 V with an initial accuracy of ±1.0% at 25 °C and ±2.0% over the industrial temperature range of -40 °C to 85 °C. The device operates within a cathode-to-anode voltage range of 1.24 V to 16 V and supports a continuous cathode current from 0.1 mA to 20 mA. It exhibits a sharp low current turn-on characteristic and a dynamic output impedance of 0.25 Ω (maximum) from 0.1 mA to 20 mA. The component is housed in a TO-92-3 package.

Feature Summary

• Programmable output voltage range spanning 1.24 V to 16 V
• Guaranteed reference accuracy of ±1.0% at 25 °C
• Sharp low current turn-on characteristic for precise regulation
• Low dynamic output impedance ensuring stable performance

Applications

• Error amplifier for isolated low output voltage switching power supplies
• Adjustable voltage or current linear and switching power supplies
• Voltage monitoring circuits
• Current source and sink applications
• Low voltage zener diode replacements

Procurement Notes

Verify the specific ordering suffix 'LP' corresponds to the TO-92-3 package configuration required for your design. Confirm that the 'A' series designation aligns with the specified ±1.0% accuracy tolerance at 25 °C. Ensure the procurement channel provides genuine onsemi components to maintain reliability standards. Check for Pb-Free packaging availability if environmental compliance is mandatory for your assembly process.

Selection Notes

Select this component when a precise, adjustable reference voltage is needed in a through-hole TO-92-3 package. The ±1.0% accuracy at 25 °C makes it suitable for general-purpose precision applications. Consider the operating temperature range of -40 °C to 85 °C for industrial environments. Evaluate the maximum cathode current of 20 mA against your circuit's load requirements to ensure proper regulation without exceeding thermal limits.

Part Context

This part belongs to the TLV431A/B series of low voltage precision adjustable shunt regulators. The 'A' variant specifically denotes the ±1.0% accuracy class, distinct from the higher precision 'B' series which offers ±0.5%. These devices are designed as direct replacements for Zener diodes in circuits requiring tighter voltage tolerances and better temperature stability.

Replacement Considerations

TLV431BLPRP

FAQ

What is the minimum cathode current required for regulation?

The minimum cathode current for regulation is typically 55 µA, with a maximum specification of 80 µA.

How does the TLV431ALPRP compare to a standard Zener diode?

It serves as a superior replacement for Zener diodes due to its programmable voltage range, lower dynamic impedance, and guaranteed accuracy over temperature.